Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: Stratified Sampling

From   "Eric G. Wruck" <>
Subject   Re: st: Stratified Sampling
Date   Fri, 9 Sep 2005 20:04:09 -0400

Of course there is some theory.  The one time I made use of stratified sampling I relied on William G. Cochran's "Sampling Techniques" (1977) published by Wiley & Sons.  Basically, you want to sample in proportion to the variance of the variable of interest.  In this way your sample is likely to be more informative.

Good luck,



>I am teaching a sophomore social statistics course.
>I've been covering sampling, especially stratified
>sampling this week.
>The students need some assistance in explaining the
>weighting procedures associated with disproportionate
>stratified sampling.  How can I demonstrate this in a
>class with a concrete example.
>Also, is there any guidelines as to how to oversample
>a particular stratum?  Assuming i have 2 groups (males
>are 20% and Females=80%). If I am drawing a sample of
>100 students - it means I would end up with 20 males
>and 80 females.  If i need to oversample the males,
>what values should i chose - 30, 40, 50? - is the
>choice really arbitrary or is guided by theory or
>I will appreciate your thoughts on this.
>Regards, YC



       Eric G. Wruck
       2535 Sherwood Road
       Columbus, OH  43209

       ph:      614.231.5034
       cell:    614.330.8846
       eFax:    614.573.6639

*   For searches and help try:

© Copyright 1996–2017 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index